講演情報
[15a-PA3-20]Toward Lead-Free Electronics: High-Efficiency All-Inorganic CsSnBr3/Sb2Se3 Tandem Solar Cells
〇(M2)PINGYEH YANG1, ChunYu Li1, YuKai Wang1, YuCheng Lin1 (1.Yuntech Univ.)
キーワード：
CsSnBr3 Sb2Se3 tandem solar cell、Lead-free perovskite tandem、High-efficiency inorganic solar cell
In this study, a high-efficiency all-inorganic lead-free tandem solar cell consisting of a wide-bandgap CsSnBr3 top sub-cell and a narrow-bandgap Sb2Se3 bottom sub-cell was theoretically investigated using SCAPS-1D numerical simulation. Through systematic optimization of the absorber layer thicknesses, effective spectral splitting and current matching between the sub-cells were achieved. The optimized tandem device exhibited a remarkable power conversion efficiency (PCE) of 33.46%, with an open-circuit voltage (Voc) of 2.0577 V, short-circuit current density (Jsc) of 18.391 mA/cm2, and fill factor (FF) of 88.42%. Compared to the individual single-junction cells (PCE of 20.36% for CsSnBr3 and 22.06% for Sb2Se3), the tandem configuration significantly enhanced spectral utilization and overall performance. These results provide a promising theoretical foundation for the development of stable, environmentally friendly lead-free inorganic perovskite/antimony selenide tandem solar cells.